Sub-micron period lattice structures of magnetic microtraps for ultracold atoms on an atom chip

I. Herrera; Y. Wang; P. Michaux; D. Nissen; P. Surendran; S. Juodkazis; S. Whitlock; R. J. McLean; A. Sidorov; M. Albrecht; P. Hannaford

doi:10.1088/0022-3727/48/11/115002

arXiv · 1410.0528

Sub-micron period lattice structures of magnetic microtraps for ultracold atoms on an atom chip

I. Herrera·Y. Wang·P. Michaux·D. Nissen·P. Surendran·S. Juodkazis·S. Whitlock·R. J. McLean·A. Sidorov·M. Albrecht·P. Hannaford

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Abstract

We report on the design, fabrication and characterization of magnetic nanostructures to create a lattice of magnetic traps with sub--micron period for trapping ultracold atoms. These magnetic nanostructures were fabricated by patterning a Co/Pd multilayered magnetic film grown on a silicon substrate using high precision e-beam lithography and reactive ion etching. The Co/Pd film was chosen for its small grain size and high remanent magnetization and coercivity. The fabricated structures are designed to magnetically trap $^{87}$Rb atoms above the surface of the magnetic film with 1D and 2D (triangular and square) lattice geometries and sub-micron period. Such magnetic lattices can be used for quantum tunneling and quantum simulation experiments, including using geometries and periods that may be inaccessible with optical lattice.

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I. Herrera, Y. Wang, P. Michaux, D. Nissen, P. Surendran, S. Juodkazis, S. Whitlock, R. J. McLean, A. Sidorov, M. Albrecht, P. Hannaford. 2014-10-02. Sub-micron period lattice structures of magnetic microtraps for ultracold atoms on an atom chip. https://doi.org/10.1088/0022-3727/48/11/115002

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